Microchip Technology AT28C010E-12JC

Overview

AT28C010E-12JC from Microchip Technology (formerly Atmel) is a 1-Mbit (128K × 8) paged parallel EEPROM with JEDEC-standard byte-wide pinout, 120 ns read access time, 10 ms maximum page write cycle, and high-endurance 10⁵ write cycles. It operates on a single 5V ±10% supply and supports hardware/software data protection for industrial control firmware storage.

For engineers reviewing the AT28C010E-12JC datasheet, AT28C010E-12JC pinout, AT28C010E-12JC application, or AT28C010E-12JC equivalent, this device serves as a drop-in replacement for legacy SRAM+backup-battery or EPROM-based nonvolatile code/data storage in embedded systems requiring reliable in-system reprogrammability without external timing components.

Technical Context

The AT28C010E-12JC implements a self-timed page write architecture with an internal 128-byte latch and control timer, enabling up to 128 bytes to be written in a single internal programming operation. Its CMOS/TTL-compatible I/Os and dual-line chip/enable control eliminate bus contention during mixed read/write operations.

It features DATA polling (I/O7 complement toggle) and TOGGLE BIT (I/O6 state alternation) for precise end-of-write detection, plus VCC sense, power-on delay, and noise filtering to prevent inadvertent writes during power transitions - all critical for unattended industrial firmware updates.

Key Specifications

Pinout & Package

AT28C010E-12JC is supplied in a 32-lead Plastic J-Leaded Chip Carrier (PLCC) package with JEDEC MS-016AE outline. Pin 1 is designated "Don't Connect" (DC) per official Atmel documentation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar paged parallel EEPROM applications.

Compared with AT28C010-12JC, the AT28C010E-12JC delivers 10× higher endurance for frequent field updates, while MX28F1000PC-12 trades write flexibility for legacy compatibility but lacks deterministic page write timing and real-time status feedback.

Availability

AT28C010E-12JC is available at Aetrix Electronics and suitable for industrial PLCs, medical diagnostics equipment, automotive body control modules, telecom line cards, and embedded instrumentation requiring stable component supply across extended product lifecycles.

Supply support for AT28C010E-12JC includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Microchip Technology acquired Atmel in 2016 and maintains full technical and manufacturing continuity for the AT28C010E family. Atmel pioneered high-reliability parallel EEPROMs for mission-critical embedded systems.

The AT28C010E series was designed specifically for industrial and automotive applications demanding guaranteed 100,000 write cycles, 10-year data retention, and robust immunity to power-supply transients - not general-purpose memory.

FAQ

What is the endurance rating of the AT28C010E-12JC?

The AT28C010E-12JC is rated for 100,000 write/erase cycles - confirmed in Atmel's official datasheet Rev. 0353E–06/99 under "High Reliability CMOS Technology". This E-grade endurance is double that of the standard AT28C010-12JC (10,000 cycles) and validated across the full −40°C to +85°C industrial temperature range. The AT28C010E-12JC achieves this via enhanced oxide quality and internal error correction circuitry.

Does the AT28C010E-12JC require a 12V programming voltage?

No, the AT28C010E-12JC operates exclusively from a single 5V ±10% supply for both read and write operations. A 12V bias on A9 is required only for accessing the optional 128-byte device identification area (1FF80h–1FFFFh), not for normal memory operation. All standard reads, byte writes, and page writes execute at 5V - the AT28C010E-12JC contains no internal charge pump.

How is end-of-write detection implemented in the AT28C010E-12JC?

The AT28C010E-12JC provides two hardware-supported methods: DATA polling (monitoring I/O7 for complement-to-data transition) and TOGGLE BIT (observing I/O6 state alternation). Both operate during active write cycles and require no external components. The AT28C010E-12JC guarantees these signals are valid after tDH = 10 ns and can be sampled at any point during the 10 ms write period - enabling deterministic firmware update sequencing.

Is the AT28C010E-12JC pin-compatible with standard SRAM devices?

Yes, the AT28C010E-12JC uses a JEDEC-approved byte-wide pinout identical to industry-standard 128K × 8 SRAMs (e.g., 62C1024) and EPROMs (e.g., 27C1001). Its CE/OE/WE control scheme matches SRAM timing models, allowing direct substitution in existing designs - the AT28C010E-12JC requires no address/data bus re-routing or timing adjustments beyond verifying write-cycle handshaking logic.

What protection mechanisms prevent accidental writes to the AT28C010E-12JC?

The AT28C010E-12JC integrates five hardware safeguards: VCC sense (write disabled below 3.8V), 5 ms power-on delay, write-inhibit via CE/OE/WE states, noise filtering (rejects <15 ns pulses), and software data protection (SDP) enabled via AAh/55h/A0h command sequence. These operate independently - the AT28C010E-12JC remains write-protected even if SDP is disabled, provided VCC is unstable or control signals violate timing windows.